Friday, November 18, 2011

How to backup android EFS

Recommended doing this with a Mobile just taken out of the box or
with any Official ROM of its Service Provider. If you have already
Flashed your phone with another ROM but its working fine, then you can
use that /efs also.

Why the /efs folder?
This
is a very sensitive system folder that contains Phone-specific
information such as the IMEI (encrypted in the nv_data.bin), wireless
devices MAC addresses, product code (also in the nv_data.bin), and much
more. Often users trying to change product codes or trying to unlock the
mobile will end up corrupting data in this location.

Even Lagfix (EXT4) don't dare to touch these files :)

Why back it up?
Well, let’s resume it saying that backing-up this little folder will keep you away from Samsung service centers.